From e78b75f5be204a0a235da995d01c778dc282bb42 Mon Sep 17 00:00:00 2001 From: Hayes Wang Date: Fri, 19 Feb 2021 17:04:41 +0800 Subject: [PATCH] r8152: check if the pointer of the function exists commit c79515e47935c747282c6ed2ee5b2ef039756eeb upstream. Return error code if autosuspend_en, eee_get, or eee_set don't exist. Signed-off-by: Hayes Wang Signed-off-by: Jakub Kicinski --- drivers/net/usb/r8152.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) --- a/drivers/net/usb/r8152.c +++ b/drivers/net/usb/r8152.c @@ -5735,6 +5735,9 @@ static int rtl8152_runtime_suspend(struc struct net_device *netdev = tp->netdev; int ret = 0; + if (!tp->rtl_ops.autosuspend_en) + return -EBUSY; + set_bit(SELECTIVE_SUSPEND, &tp->flags); smp_mb__after_atomic(); @@ -6134,6 +6137,11 @@ rtl_ethtool_get_eee(struct net_device *n struct r8152 *tp = netdev_priv(net); int ret; + if (!tp->rtl_ops.eee_get) { + ret = -EOPNOTSUPP; + goto out; + } + ret = usb_autopm_get_interface(tp->intf); if (ret < 0) goto out; @@ -6156,6 +6164,11 @@ rtl_ethtool_set_eee(struct net_device *n struct r8152 *tp = netdev_priv(net); int ret; + if (!tp->rtl_ops.eee_set) { + ret = -EOPNOTSUPP; + goto out; + } + ret = usb_autopm_get_interface(tp->intf); if (ret < 0) goto out;